112. ATBACTCS. 303 



from tho end of tho snout, shorter than the parietalB ; loreal short, 

 not or but slightly longer than deep; one postocular ; temporals 

 1+2; six upper labials, third and fourth entering the eye; thn 

 or four lower labials in contact with tho single pair of moderately 

 large chin-shields, which are separated from the symphysnl. Scales 

 in 1") r.\vs. Vent nils 144-107; anal entire; subcaudals 23-137. 

 Black above, with light annuli which widen towards the belly ; or 

 reddish with black annuli disposed in pairs ; belly barred black and 

 yellow. 



Total length 610 millirn. ; toil 60. 



Ecuador and Brazil. 



a. d (V. 144 ; C. 29). W. Ecuador. Mr. Fraser [C.]. 



(Type.) 

 6. $ (V. 167 ; C. 26). Canelos, Ecuador. Mr. Buckley [C.]. 



c. <? (V. 1C.:}; C. 37). Pebas. Mr. Hauxwell [C.]. 



d. $ (V. 155 ; C. 28). Upper Amazon. Mr. E. Bartlett [C.]. 



2. Atractus latifrons. 



Geophis latifrons, Giinth. Ann. $ Mag. N. H. (4) i. 1868, p. 415, 

 pi. xix. tig. B, and ix. 1872, p. 15. 



Snout rounded. Rostral rather large, a little broader than deep, 

 the portion visible from above at least half as long as its distance 

 from the frontal ; internasals once and a half to twice as broad as 

 long ; frontal as long as broad or a little broader than long, as long 

 as its distance from the end of the snout, shorter than the parietals ; 

 loreal short, not or but slightly longer than deep ; one postocular ; 

 temporals 1 -+ 2 ; six upper labials, third and fourth entering the 

 eye ; three or four lower labials in contact with the single pair 

 of moderately large chin-shields, which are separated from the 

 symphysial. Scales in 17 rows. Ventrals 142-150 ; anal entire ; 

 subcaudals 35-40. Body with black and yellow or red rings, which 

 may be broken up and irregular on the belly, the scales on the red 

 rings black-edged ; head black above, with a yellow vertical bar 

 in front of the eye, and a triangular yellow blotch on the temple, 

 extending or not across the occiput. 

 Total length 410 millim. ; tail 70. 

 Upper Amazon. 



A. Black rings disposed in 12 to 17 pairs, each enclosing a narrow 



yellow interspace and separated by broad red rings ; a yellow 

 bar across the occiput. 



o. Hgr. (V. 150; C.86). Pebas. Mr. Hauxwell [C.]. 



(Type.) 



b. Hgr. (V. 142; C. 86). Moyobamba. Mr. A. H. Roff [C.l. 



e. <$ (V. 143 ; C. P). Upper Amazon. Mr. E. Bartlett [C.J. 



B. Black rings 65, separated by narrow yellow rings ; no yellow 



across the occiput. 



d. <S (V. 146 ; C. 40). Upper Amazon. II. W. Bates, Eaq. [C.]. 



